Saw



June 30, 1936.

J. N. ALEXANDER SAW Original Filed July 21, 1933 Patented June 30, 1936 UNITED STATES PATENT OFFICE Application July 21, 1933, Serial No. 681,634 Renewed May 8, 1935 9 Claims.

This invention .relates to saws, and more particularly has reference to a lubricating device for cross-cutsaws.

7 .As is well recognized, :it is necessary-tofrequent- 'lylubricate .a saw, :and previously this operation has usually beencarried .out manually. If asaw requires lubrication during an actual sawing operation, it is, :of course, necessary to interrupt such sawing and properly lubricate ,the blade.

Obviously, this results in "loss of :time :and efilciency. Furthermore, suchmanual-operations do not insure .a thorough lubrication, particularly when done by a=careless workman.

Although there have previously been devices for automatically lubricating :a saw, certain disadvantages ;reside in such' prior devices. .TIIIG principalhobjection is due to the fact that those devices !do:n0t insure a thorouglilubrication of the working area, and-in orderto secure the-same it is necessary to manually distribute the -oil over the working area of the blade. For this. reason, such :devices are open ;to substantially the same the blade, above referred to. "1 1 An objectof myrinvention-is to overcome the I aboveementioned, .and other, disadvantages heretofore inhering in the lubrication 'lOf .saw blades. Another object of :my inventionfis to provide a devicefor effectively lubricating the-working area of 'the saw'blade.

- Yet another :object of :my invention :is to providea :device whereby .a saw blade maycbe'lubri-v cated withoutzinterruption toza sawing operation. ".To .accomplish'zthe :above, :androther important objects .as will appear'hereinafter, my invention in general embraces means for supplying alubricant to a :saw blade,swhile aniactual sawing operation is in progress, .and such :rneans being :50 adapted to discharge the 'lubricant .upon the blade that :the working area of the blade is main tained in a well'lubricated condition. 7

Lathe-accompanying drawing, I have'disclosed' one embodiment-of my invention as applied ,to a

I objectionras 1thezsystem of manually lubricating cross-cut saw, it -being,'o'f course,'understood that Fig. 4 isa'sectional view along the line l l of Fig. 2, looking in the direction of the arrows.

' Referring more particularly to Fig. 1,"I have shown :a saw rblade l, partly cut away, provided withhandles 2-and 3. These handles are ;prefer-, 5

ably made of aluminum, becauseof ease of construction and certain qualities :of -durability,1but it isto be appreciated thatotherqmaterials-maybe substituted in'lieupf aluminum; 7 1

Referring more ,particularlyto Fig. ;2 these 10 handles aresecured to the blade .by means of.ccnventional stirrups 4 which extend around each end :of the blade. The .stirrups '4 are provided with threaded shanks 5, andfthe handles land 3 areqadapted to be screwed thereon. A frustol5 conical member 6 is adaptedto ,be fittedlover the stirrup, .and is provided with diametrically opposed notches which bear .upon ,the :upperside of the blade 1. The handles 2 and .3 are provided with frusto-conical recesses 8 whichareadapted 2.0 to receive the member T6 in altight fit. It ,will, therefore, be seen that the handles ,2 and ,3 .may be tightly secured to the .bladebymerely screwing the .handles upon .the ,stirrups v. l. This results in-atightening .ofeachstirrup around the lower 25 edge of .the.blade,,and forces the member 6 into firm engagement with the upperedge.

In describing the specific construction .of the lubricating !device, I shall refer now .to .oneof the handles, it being understood that except in one 30 respect, vas will .be hereinafter pointed out, the twdhandles areidentical in construction. In-the upper .portion .of the handle, there is .drilled a recess.9 which serves as areservoirfor the lubricant. A washer .l l is positioned at .theiopenend 35 of .the reservoir, and-there is threaded over the 7 open enda-closure-member |.2.- The upper :part of this .closure member is slightly convex, .as shown in Fig. .2, and is composed of flexible material, The cap 12 may be madeof tin, orv some other suitable .metal, .or even a stiff andairtight woven material.

In the base of the chamber 9,.thereis drilled a seat 13, and there is positioned within, this seat a one-wayiiip valve 14. "The flip valve is so constructed that it ,willremain-closed under nor'-. mal conditions-that .is, it will remain closed when the pressure of the liquid within chamber 9 does not exceed that which normally results from the hydrostatic head of the lubricant. How- .50 ever, when this pressure is exceeded, by virtue of flexure of the cap l2, the valve I4 opens and permits adischargeof lubricant from the chain'- ber-'9.

=-Flip valve J4 is the rubber valve whose concause of the annular channel IS, the well 2| will such latter 'event, it m ght be pessible to lubrie any rotational{displacement with respect tothe 'tion. 7 V

Extending from the base of the seat 13 is apasfiguration is shown in cross-section in Fig.2. This rubber valve is of nipple shape, the tip of the nipple being split as indicated in Fig. 2.

See the line of the split in the cross-section of the flip valve M. The rubber'material gives at.

the teat. The split opens ,when'the pressure pump is high enough to distort the rubber at the teat. The rubber is ordinarily sufl'iciently resistant to'withstand the weight of the column of 7 liquid in the reservoir 9 without permitting the ,Split in the teat to open. Such valves are true a pressure valves, and

are of very' simple construcsage I5 which communicates withan annular groove IS in the lower face of the handle.

Ring washers l1 and I8 are interposed between the lower face of handle 3 and the upper faceof the base of conical member 6. A slight lip 19 is provided upon the upper face of the base bf mmber S in order to insure properfseating. of the washer-I85 r Afwell 2 l is'drilledin thebaseofmeniber s n is adapted to register with the annular channel J6 inthe'handle'. It-will be observed that, be-

be incommunication with the conduit l 5 regardless of any rotationof the handl'e'b. It will be observed that the basememberfi is fixed against blade l and 'there e tends from the well 2] aidischarge channel I 22; ;'Ihis channel isinclined slightly Tto' the longitudinal axis of the: blade I,

[and the particular angle employed is such as to direct any lubricantdischarged fromthe conduit 22 well outupon the :bladepf. thesaw', The

lubrieant is therefore, discharged upon the work-; ing area of the blade whereit is readily'distrib uted as the-saw passes through the wood. It will be noted that in Fig. .1 thechannel 22extends horizontallyfrom the well 2]. I have found that there is usually a sufiicientdrop in the jet of lubricant after it is diSChfl-IjgfidII'OIil ,thechan'nel so that it strikes'the blade. Howevenif there should be a tendency forthe jet to pass overthe top of the blade, because of .excess pressure, or

' Iorfsome other reason, then of course the chan'nel "maybe inclined downwardly. L j Y t 'It will be seen from Fig. 3 that each handle is provided with only'one discharge passage ll; and i the two discharge passagesare on opposite sides of the blade. .It.is, of; course, obvious, however, that each handle may be provided with two'of these passages; pne'on each side of the'bladefln icate the saw effectively when only one of the handles is ;pr.ovided with a lubricating system;

.H9wever, I .find' the preferable arrangement to be as shown in thedrawing, in which both of the handles are providedwith lubricating devices, one device being adapted. to clischa'rge oil upon oneside of the blade, while the 'otheris adapted to dischargeupon theother side. r

The; operation. of my invention is believed to Qbe apparent from the foregoing. The. cap I2 is unscrewed from the. handle and the reservoirnl 'filled' with a suitable lubricant, such as a lubria V eating 011. The capll2 is then replaced, and when it is "desired to lubricate the blade,- pressure is exerted upon the cap in order to depress theflexible portion; This increases'the pressure upon .the;body"of oil in'the reservoir 9 sufficiently to open the flip" valve 14. The 011 is forced through ithe conduits l well-Zland discharged in-a rela- 7 adapted to discharge the lubricant upon the other side of the blade only.

tively fine stream from" discharge conduit 22.

point well within the working areaof the blade.

7 This stream of oil impinges upon the blade at a r The subsequent passage of the blade through a V I block of wood serves'to distribute this oilthrough-V out the entire workingarea'and thus eifectively lubricates the blade. 1

It will be appreciated that my invention may be easily and economically manufactured, and" that it insures efiective lubrication of a saw blade.

Inasmuch as the oil strikes the blade at a. point that passes. through the wood in: a normal saw 7 ing operation, such oil as is discharged upon the -bladeis automatically distributed throughout the working area of the blade; 'The only manual operationnecessary is the flexure of-the cap l2 v V which, of course, can be efie'cted by slight presr 7 sure of the thumb. Manual spreading of the" 'j lubricant over the working area is ther 'WhileI have disclosed one embodimentof invention, itis, :of course, obvious that various modifications may be made in the details of con- 7 struction without departing from thel'spirit of my invention, the scope or which is to be deter mined solely by the appended claims. Iclaimz f carried by'each'handle, and'mea'ns carried by lubricating the other side of the blade.

' "2. A cross-cut saw comprising "a blade, a handle carried by each handle, means carried by one" handle fordisch'arging a 'lubricantjupon oneside f of the blade only, by forcefully ejecting'a stream of lubricant within the working area thereof, and

means'in" the other handlefor discharging;a-

lubricant upon'the other side of the blade only} by forcefully ejecting a stream of lubricantwith in its working area.

3. A cross-cut saw comprising a blade adapted to receivelubricanton both surfaces, a pair of handles therefor, each'handle beingprovided with a reservoir to holda'supply of lubricant, a' conduit in communication with each reservoir and adaptedto direct a stream of thelubricant upon the working area of the blade, each reservoir discharging on one surface'only, and onf'a different surface from the other reservoir, valves toj normally prevent the passage of lubricant conduitsiand means ior opening the .valves.

through the 4. A cross-cut sawcomprising a blade, 1 rality of handles'therefonl a reservoirin each i handle to contain a supply of lubricant, a conduit incommunic'ationwith each reservoir and adapteoi 'ed' to direct'the lubricant from the' reservoir 7 onto one side of the blade only,,anda correspond r 7 ing reservoir andconduit'in the other handle 1 5. 'A'crossecutsaw comprising ablade, adapted to receive lubricant on bothsurfaces, .a pair of handles therefor, each of. said'handles beingprovided with a reservoir near its top for the purpose of holding a supply of ,lubricant a conduit extending from each of said reservoirs, and adapted to discharge the lubricant ontothe saw'blade,

a pressure valve to normally prevent passage off the lubricant from the reservoirtothe conduit,

and means at the top of the'handle to increase the pressure of the lubricant in the reservointhe lubricant from each reservoir being adapted to handles therefor, each handle having drilled in its upper end a reservoir for a lubricant, a conduit extending from the reservoir to the base of the handle and adapted to discharge lubricant upon the working area of the saw blade, a pressure valve to normally prevent passage of oil from the reservoir to the conduit, and a flexible cap over the open end 01' the reservoir at the top of the handle, the lubricant from each reservoir being adapted to lubricate the opposite side of the blade from the other reservoir.

7. A cross-cut saw comprising a blade, a handle therefor, a reservoir carried by the handle, an angular groove in the base of the handle communicating with the reservoir, a member afiixed with respect to the blade and having a well therein, said well communicating with the groove in the base of the handle and an outlet port from the well, said handle being revolvable with respect to the member, and means to ejecta stream of lubricant from the reservoir to the groove through the well and outlet port on to the blade.

8. A cross-cut saw comprising a blade, a handle at each end of the blade, a lubricant reservoir carried by each handle, and means in the handles and shielded thereby for discharging a lubricant from each reservoir upon the working area of the blade, on one side only, each handle being adapted to discharge on a different side of the blade. 7

9. A cross-cut saw comprising a blade, a pair of handles therefor, each handle being provided with a reservoir shielded in its handle, conduits in communication therewith and adapted to discharge the contents of each reservoir upon one side of the blade only, each handle being adapted 20 to discharge on a different side of the blade;

JAMES N. ALEXANDER. 

